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Component Skew during Reflow Process

Views: 5841

#83111

Component Skew during Reflow Process | 1 August, 2019

hi Team,

observed component skew during reflow process.

Inductor location. I have attached the image for the same.

Please provide your valuable feedback.

Attached are the images for the same.

Its SAC305 alloy , R0L1 flux chemistry.

Regards, Ameen

Attachments:

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#83122

Component Skew during Reflow Process | 1 August, 2019

I noticed that your solder mask registration is off some.

Does it cover a significant portion of any of the pads for these parts?

If so, is it possible that the surface tension of the solder at liquidus is enough to skew the part when the solder is pulled from the solder mask to the pad?

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#83125

Component Skew during Reflow Process | 1 August, 2019

if the inductors were your only problem. My mom wouldn't be pleased with the V30200C dual voltage rectifier just below the inductors

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#83128

Component Skew during Reflow Process | 1 August, 2019

Looks like you have too much solder, looks like is balling out of the side of your pads.

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#83135

Component Skew during Reflow Process | 1 August, 2019

Hi ALL,

Thanks for your valuable inputs. Will go through the suggestions and come back.

Regards, Ameen

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#83137

Component Skew during Reflow Process | 2 August, 2019

Hi All,

Any method to check any vibration in reflow oven.

Regards, Ameen

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#83143

Component Skew during Reflow Process | 2 August, 2019

While I agree there is "too much solder" on this board, I don't think that is the sole explanation of what's going on here.

I don't think the pads on the board match up well with the terminations on the components.

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#83335

Component Skew during Reflow Process | 22 August, 2019

I have to agree with Dave here. Can you compare the datasheet pad recommendations to your design ? It may help to show the forum a picture of the bare PCB pad design along with a pic of the bottom terminations on the part.

What Stencil thickness are you using here ?

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#83347

Component Skew during Reflow Process | 23 August, 2019

Hi ,

We are using 5 mil thickness. Sure will very the PAD with component data sheet recommendation.

Regards, Ameen

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